I love my iMac, and the new G5 is the best looking PC Case around. If it's quiet, I might get a low end one. But I don't know about AAC. I love the Apple store and all that, but I think I'm going to get Gateway's wireless streaming DVD player and it does WMA and MP3. Apple really needs to help AAC proliferate beyond the iPod and Apple store or it might not have much staying power.